Merge pull request #60 from pmjones/develop-2

Major rewrite of the README
Merge pull request #61 from pmjones/develop-2

typo fixes
typo fixes
Replaces Example with ExampleWithParams where appropriate.
Merge pull request #62 from jeremykendall/fix/ExampleWithParams-typos

Replaces Example with ExampleWithParams where appropriate.
Merge remote-tracking branch 'upstream/develop-2' into develop-2
add ContainerAssertionsTrait